Derrick



Dec. 3, 1931 W. F. WRIGHT ET AL Filed Feb. 11, 1930 DERRICK 2 Sheets-Sheet l INVENTORS WILL/AM EWR/GHT ATTORNEY Dec. 8, 1931.

w. F. WRIGHT ET AL DERRICK Filed Feb. 11, 1930 2 Sheets-Sheet 2 INVENTORS WILL/A F Patented Dec. 8, 1931 OFFICE WILLIAM F; WRIGHfiOiE if'oitk, ANiS Jo'HN sQJ-ENKs; be sme ma-i, PENNSYLVANiA,

conroim'rlonor nnLAwARE T MANUF T R NG COMPANY, F YORK, PENNSYLVANIA, A

Application fi led "rebma'ryj 11,1"930. serial Nb. $457,470.

Our invention relates to .derricks and the like and has for a specific objectto provide a novel hoisting device adapted 'parti'cu'larly for removingand replacing' tl'ije bushingsof large .1 transformers and circuit breakers, although obviously the inventron is not limited ,tosuch application but may lie. used-also for-handling other objects as'well."

Heretofore, considerable difficulty has been experienced in"handling large transformer. and circuit-breaker f bushings because 1 the bushings are heavy hulky a'nd fragile and must be handled withc'are to "avoid the danger of breaking or otherwise injuring them. The

with difficulty because ofith'e proximity of high'tensionwires with obvious d'eiiiger if the bushing, the rigging or the workmen strike these wires.

0 An objectoi't our invention therefore, is to provide a very simple form'ot derrick with which a bushing may be raised out of-and lowered into the socket 'tl'ie'refor'in; a trans former, or circuit breaker;

Another object is tozprovi'de 'nieans for turning the bushing abouta tIElIlSVGlSBLXlS so that it will clearthe transformer tank or circuit-breaker tank :and also any overhead transferred to or from wires as it is being 0 the tank.

Another object of the invention is to pro.- vide a hoisting device which will require a the derrick which may be applied to atrans former or circuit-breaker tank with a minimum of effort. v I

. Another object is to provide in'eans on the derrick by whichattachment may be made to the flange of the bushings and also to'rendei said attachment means adjustable for'bushiii-gs of drfl'erent size.

5 These. and other objects oi our inventionv handling of these bushingsisusual'ly attended will appear in the following specificati'on o'f a pref-erred embodiment andthereafter the novelty and scope of the invention will he pointed out in the claims.

In the accompanying drawings;

v Figure: 1: is a: side elevatio ef our im-v proved derrick, showing the-devlce in the act of 'r'emovi'n'ga circuit-breaker bushing from a circuit-breaker, and also showing in broken hnes the position of the bushing after it has been-removed "and placed on a suitable supr p v Fig-2 is-a fragmentar view of a portion of the derrick looking in the direction of the ws f Fig.1;

I rig. s is'a'front elevation ofthederrick looking in thedirection of the arrows 33 of Fig.1; A p 'F' g. 4 is a view in section taken substantiall-y entire line 4+4 of Fig. 3; and

Fig.5 is a detail view, in section, ofa clam ping device, the section being taken on the line 5 50f Fig.4. .7

In the drawings, we have used the. numeral 10 to indicate a circuit br'eaker tank in which is fitteda bushing 11. The latter is provided with the usual insulator members 12and att'achm'ent flange 13 which rests upon a socket flange 14in the tank. .The'bu'shing is provided with the usual depending shank portion 15 which fits into the circuit-breaker or transformer as the casein'a'y be.

Our im roved derrick is provided with means for anchor'ing'thelegs thereofto the tank 1O said means consisting of'an arcuate anchor band 16 preferably adapted to fit upon theb'ottom flange -17 of the tank. The anchor-hand terminates in a'pair of up-standing ears 18 through which are passed hook bolts 1-9 adapted to engage hand holds '20 formed in the wall of the tank. Connecting each ear 18-to the anchor band is a pair of side flanges 21 which provide bearings for a hinge pin 22. Hinged upon the pins 22 are the legs 23 of the derrick. As shown in the drawings,

to beturned by a standard chain hoist .mech-q the legs of the derrick may consist of sections of pipe. The pipes 23 are connected at the to) ba ")iUl' of tubular members'24 and l. j l J. a fixed by means or yoke clamps 24a and 25a respectively to the pipes 23. Running through the member 24 is a shaft 26; secured to this shaft and 101111ii1l9d inthe. yokes 24a are drums 28 about which are wound guy lines 29. These u lines are secured at o b their outer ends to a suitable anchorage, such, for instance, asa socket flange on the far side of the tanklt). Mounted onone endof the shaft 26 is a standard chain hoist'mechanism 30 provided witha sprocket Wheel 31 hearing the usualjhoisting chain Thus, by pullmg on the chain 32 the "guy lines are taken'in or paid out, thereby eontmlling the angle fe l l'l "t tt 1 l 0 too (.eiiit l s W1 .1 iespec o t 1e anc ior age. It will. be observed that each hookbolt point above the pivot pins 22, so that there will beno tendency for the anchorage band to lift away from the tank, hutinstead it will be pressed down against-the flange 17 of thetankby the thrust of the derrick legs23. 7 .f

.Within the. member 25 there is shaft 27.

Secured to this shaft ,amljournaled. in the yokes 25aaredrumsfil. Atoneendl of the shaft 27, and preferably on the opposite side ofthe derrick from the mechanism 30, is a standard chain hoist 34- provided with the: usual sprocket wheel 35 controlled by a chain. 36.:fllhus, by pulling on, the chain 36 the shaft 27- may be ,rotated. and the drums :83

, fixed thereon will take up or pay ;out apain 3 8 slidal ile alonpgthe derrick legs 23. c

The carriages 38 are preferably provided with rollers SQQbearing on opposite sides of each derrick leg. 'Journaled in the carriages. 3S a tran fccrse shaft-40 which is adapted of cables 37 which lead to a nair of carriages It will be understood thatthe chain. n eohan s n' referred to. in connection withthis shaftand the. shafts 26 and: 27 may be of any suitable type in which, the rotation otthe driven shaft may be controlled and maintain-ed. at, any desired position, either by non-reversible gearing or suitable automatic brake mechanisma v By way-of illustration, wehave-shown a specific formof hoisting mechanism in connection with. shaft 40. butit will be understood thatour invention is not limitedto this particular type of.hoistingmechanism. As illustrated, the shaft lO has ayworm wheel-41 fixed thereon and thelattcr is eng mged by a worm 412 on a transverseshaft 43. I The shaft- 43 in turn is counect'edby; a pair of miter gears lel to a shaft 45 and the latter carries; a sprocket wheel 46 provided with an operating chain 4'7, so that by pulling on the chain- 47 the shaft lOinay be turned through any angle desired. I 1 Fixed to the shaftj lO'is a spanner plate .ingiblock is aperturedto receive a bolt 52 by which it secured to the bushing. The

1 flange 13 of the bushing is normally formed with slots'53 tojre e'ei've the bolts by which it is clamped to thesocket flange 14;, as shown at 55 in Fig. 5, and'the same slots 53 are used to receive the bolts 52 by which the flange of i9 is attached to the anchorageblind: at a 5 first applied to the bottom of the tank and made fast thereto by taking up on the hook bolts 19. fasttoone of the socket flanges 14 on the farside of the tank, and the chain 32 is operatedtotake up on the guy lines so as to draw-the derrick up toa position slightly inclined from the Vertical, as shown in Fig.7 1. At the same time the chain 36 is operated to bring thespanner plate 48 into proper position .with respect tothe flange of the bushing-p-The chain 4'1 is operated to turn the shaft-40, so that the spanner plate will lie normal tothe axis of the bushing. The bolts 55. are then removed and the bushing is bolted to the clamping blocks 50, the latter being clamped at suitable adjustment on the spannerplate." After this, the chain 36 is operated to draw the bushing upward until the" shank clears thetransformer shell. Then the-chain 47 is operated to turn the shank forward so that the bushing will lie substantially transverse-to the" plane of the derrick. Thereafter, the chain 32 is operated to lower the derrick to the position shown in broken lines inFig. 1 and at the same time the chain 47 is oper'atedto turn the bushing to a horizontal position, or a position parallel to thatof a suitable support 56. This sup port may be the body ofa truck on which the. bushingsare-transported to and from the transformer.

In applying a new bushing to the tank the operations are reversed. The derrick is raised by drawing'on thechain 32 and the bushing is turned tosuch position as to enter the socket in the tank by operating the chain 47, after which the chain 36 is operated to lower the bushing into its socket. The bolts arethen undone to release the bushing The guy lines 29 are then made from the spanner plate and the bushing is then bolt-ed to the socketfiange 14* iii-the usual manner. The derrick is readily attached to and detachedfrom the tank, so that" it may be moved'from one tank to an other'as n'eededf i I f The foregoing description is to be "considered as illustrative and not limitative of our invention and it will be understood that various changes'may be made in form, construction and arrangement of'parts Without departing from the spirit and scope of our invention.

We claim:

1. A derrick comprising a longitudinal supporting member, an attachment device supported thereby and including, means for clamping a load to said device, means for moving said device lengthwise of the supporting member, and means for rotating said device.

2. A derrick comprising an upright, an attachment device supported thereby and inh eluding means for clamping a load to said device, means for raising and lowering said device along the upright, and means for turning said device about an axis transverse to that of the upright.

3. A derrick comprising a supporting member, a plate-like member sup ported thereon, a clamping device adjustable on the plate member, means for moving said, plate lengthwise of thesupporting member, and means for turning the member about an 7 axis transverse to that of the supporting tachment device secured to the shaft and ineluding means for clamping a load to said device, means for moving the shaft lengthwise of the upright, and means for rotating the shaft.

6. A derrick comprising a pair of uprights, means for holding the same in mutually spaced relation, a saddle mounted to move lengthwise of each upright, means for raising and lowering the saddles, a shaft journaled in said saddles, means for rotating the shaft, and an attachment device carried by and rotatable with said shaft.

7 A derrick comprising a pair of uprights, means for holding the same in mutu' ally spaced relation, a saddle mounted to move lengthwise of each upright, self-locking means for raising and lowering the saddles, a shaft journaled in said. saddles, selflongitudinal lockingmeans for rotating the shaft, and an attachment *device carried by and rotatable with said shaft. k H v 8. Aderrickcomprising an anchorage, an

upright hinged thereto, means for varying r the angle of'the' upright with respect to the anchorage, an attachment device carriedby the upright, means for moving the attache ment lengthwise of theupright, and means for turningthe attachment device about an axis transverse to that of the upright.

9. Adel-rick comprlsmgan anchorage, an

, upright hinged thereto, means for varying right, and self-locking means for turning the attachment device about an axis transverse to specttothe anchorage,-an attachment device carried bythe upright, self-locking means formoving the attachment device 1 parallel to the longitudinal axis of the upright," and:

supporting member with respect to theband,

an attachment member carried by the supportingmember, clamps for securing a bush,- ing'to the attachment member, and'means for moving, the' attacl11nent member lengthwise o'f-thesupport. g 1 i *12: A derrick for inserting bushings into and removing'bushings from a tank, said derrick comprising an anchorageband', means for attachingtheband to the tank, a longitud-in'a'l-supp orting'member hingedto the band, means for v'aryingt'he angle of the supporting'member with respect to the band, an attachment Vmember carried by the supporting member, clamps forsecuring a bushing to the attachment member, means for moving'the attachment member lengthwise of the support, -and means for turning the attachment member about an axis transverse to tha t. of the supporting member,

-13. A derrick for inserting bushings into and removing bushings from a cylindrical tank, said derrick comprising an arcuate an' chorage band adaptedto fit a cylindrical portien of the tanlgmeansgfor attaching the band to the tank, a longitudinal supporting member hinged to the band, means for varying the angle ofthe supporting member with respect to the-band, an attaching-member carried by the supporting member, clamps for securing a bushing to the attachment 'member, means for moving the attachment member lengthwise of the supporting member,

and means forturning the attachment member, about an-a-Xis transverse to that of th bushing. V

14. A derrick for inserting bushings into and removing bushings from a tank, said derrick comprising an anchorage adapted to be secured to the tank, a longitudinal supporting member hinged to the anchorage, means for var ying the angle of the supporting member with respect to the anchorage, a plate member carried by the supporting member and formed secured to thetank, a longitudinal supporting member hinged to the anchorage, means for varying the angle of the supporting mem berwith respect to theanchora'ge, a plate member carried by the supporting ineinbei' and formed With an arcuaterecess to receive a bushing, clamps readily adjustable on the plate and adapted to clamp the'bushing to the plate member, and means for moving the nected to the, support and wound about the hoisting drum, an attachment device carried by the support and mounted to turn about an axis transverse to the axis of the upright, a self-locking gear for turning said attachment device, and a chain belt for operating each of the self-locking gears.

c In testimony whereof, We have signedthis specification. I

WILLIAM. F. WRIGHT, JOHN S. JENKS.

plate-member lengthwise of the supporting member. I V s r 16. A derrick for msert ng bushings into and removing bush ngs from a tank, sa-idderrick comprising an'anchorage adapted to be secured to thetank, a longitudinal supporting member hinged to the anchorage, means for Varying the angle of the supporting member with respect to the anchorage, a plate member carried by the supportingmember and formed with an arcuate recess toreceive a bushing, clamps readily-adjustable on the plate and adaptedto clamp the bushing to the plate member, means for moving the plate member lengthwise of the supporting memher, and means for turning the plate member about an axis transverse to that of the supporting member. s r 7 1,7. A. derrick comprising an anchorage, an upright hinged thereto, a drum for a guy line mounted on the upright, a hoisting drum also mounted on the upright, an attachment device mounted to slide lengthwise of the upright, a line connected to the attachment,

- slidable lengthwise of the upright, a line con- 

